Hydraulic hoist



June 16, 1942. J, v, N soN HYDRAULIC HOIS'I.

Filed July 25, 1941 2 Sheets-Sheet 1 SYWMM e M V Patented June 16, 1942 I UNITED, STATES PATENT- OFFICE j 2.2mm mason c nors'r John Virgil Bankson, Greenviile, Ohio Application July-25, 1941, Serial n. 404,013 3 Claims. (01. 214-131) This invention relates to elevating and lowering means for farm implements.

An object of this invention is to provide, as an attachment for a tractor, a hoist which may be used for elevating or lowering an implement such as, for example, a sweep rake.

Another object of this invention is to provide that this hoist may be reversed in its positionwhere the implement extends from the rear of the tractor, and. maybe used with other implements.

With the above objects and such others which may hereinafter appear, the invention consists of the novel construction, combination and arrangement of parts as will be more specifically described and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications may be resorted to which fall within the scope of the invention, as claimed.

In the drawings:

Figure 1 is a detail side elevation, partly in section, of a tractor having a hoist constructed according to anembodiment of this invention mounted thereon for raising or lowering an im plement such as a sweep rake or the like.

' Figure 2 is a sectional view, taken on the line 2-2 of Figure 1, showing the tractor in dotted lines.

Figure 3 is a sectional view, taken on the line 33 of Figure 2.

Figure 4 is a sectional view, taken on the line 4-4 of Figure 2.

Figure 5 is a sectional view, taken-on the line 5-5 of Figure 2.

Referring to the drawings the numeral I0 des ignates generally a tractor structure of conventional construction which includes a pair of longitudinal frame members II. A sweep rake, generally designated as I2, is pivotally carried by the tractor l0, and includes a rake member l3 which is secured to a pair of draft beams or members l4 extending rearwardly from the rake member I3. The rear end portions of the draft the rear axle I! of the tractor I. by means of U-bolts ll.

In order to provide a means whereby the sweep rake |2 may be elevated or lowered I have provided a hoist structure which is constructed in the form of an attachment" for mounting on the beams ll of the tractor III. This hoist structure includes a horizontally disposed and transversely extending shaft H which isv positioned below the longitudinal tractor beams II, and is supported below the beams I by means of suspension members including a plate I. which is fixed by fastening devices It to the outer side of the beam I, and the lower end of each plate I 3 has secured thereto or formed integral therewith, a bearing boss or sleeve engaging about the shaft H. The opposite ends of the shaft extend outwardly beyond the suspension members including the plates l3 and the supporting bearings 20 and the extended portions of the shaft I'I have rockably mounted thereon sleeves 2|. The sleeves 2| are held against endwise movement bymeans of a nut 22 which is threaded on a reduced threaded stud 23 and a washer 24 is interposed between the nut 22 and the adjacent end of a sleeve 2|.

Each sleeve 2| has fixed thereto a pair of downwardly extending parallel suspension arms or levers 25 which are disposed adjacent the outer end portion of a sleeve 2|. The lower end portions of the levers or arms 25 are connected together by means of a connecting bolt 23 and preferably a roller 21 is mounted on the bolt 26 25 will raise the draft members I4 and the rake members or beams II are pivotally secured to structure l3 therewith.

' Each sleeve 2| has fixed thereto a crank or arm 28 which extends from the sleeve 2| in a direction substantially opposite from the xtension of the arms or levers 25. A link 29 is pivotally connected, as at 30, with a crank or arm 28 and is provided at its rear end portion with an eye 3| mounted on a stud or bolt 32 which is carried by a horizontally shiftable head or slide 33. The head or slide 33 extends beneath the two tractor frame members l and is slidably mounted on a pair of parallel guide bars 34. The guide bars 34 are fixed between. a pair of angle members 35 and 36 which are secured by fastening devices 31 and 33 respectively to the under-sides of the tractor frame members Ii. A hydraulic cylinder 39 is disposed below structure I2.

the tractor frame members being supported substantially in the longitudinal center of the tractor ill by means of a pair of supporting bars 49 and 4|. The supporting bars 48 and 4| are fixed between the two tractor frame members The cylinder 39 has slidable therein a pis-q ton 42 which has secured thereto one end of a connecting rod 43. The connecting rod 43 extends through one head 44 carried by the cylinder 39 and the opposite or outer end of the connecting rod 43 is secured, as at 45, to the center of the cross head 33. The head 44 may be provided with an extension 48 which may be mounted in an opening 41 formed in the vertical side 48 of the angle member 36.

The opposite head 49 of the cylinder 39 has a nipple or extension 50 extending therefrom with which a fluid conducting pipe is adapted to be connected.

A pump or pressure member 52 is mounted on the tractor l0, adjacent the rear thereof, and is provided with a piston operating lever 53 which is connected with the piston rod 54 of the pump by means of a pair of links 55. The links 55 may be connected to a cross head 56 which is fixed to the piston rod 54 and the lower end portion of the lever or handle 53 may be bifurcated, as at 51, for engagement on opposite sides of the pump 52. The pump cylinder 52 has a combined intake and outlet connection 58 connected withone end thereof and, in the present instance, the forward end, and a connection 58 is connected to a short length of pipe 59.

A fluid reservoir 60 is disposed in an elevated position adjacent the rear portion of the tractor l9, and has a nipple 6| in the bottom wall thereof with which a flexibl hose 52 is adapted to be connected. The opposite end of the flexible hose 52 is connected with one side of a T-coupling 63 interposed in a pipe line 54. A rearwardly opening check .valve 55 is interposed in the pipe line 64 and the pipe line 64 is formed with a vertically disposed and downwardly extending branch 66 which is connected to one branch of a second T-coupling 61. The coupling 51 is connected with the branch or pipe 59 by means of an L 58. A pipe 69 is connected with another branch of the T-connection 6! and a forwardly opening check valve 10 is interposed in the pipe 69 between the branch 55 and the second vertical branch 1|. The verticalbranch H is connected with the pipe 54 through a valve The valve structure 12 i manually operable and is adapted to provide means for cutting off or establishing communication from the flexible hose 52 to the branch pipe H. The lower end portion of the branch II is connected with one side of a third T-coupling 13- which is connected with the pipe 59. The pipe 5| is connected at its rear end with the T-coupling 13.

The reservoir 69 is adapted to be supported in an elevational position by means of a substantially L-shaped supporting bracket 14 which has formed integral with the lower leg 15 thereof,

of the pressure cylinder 39.

asses-r:

side of the tractor l9, and connected one with each of the cranks 28.

, In the use and operation of this hoist structure the shaft I1 is adapted to be mounted beneath the frame structure of the tractor III by the suspension members l8 and 29 and the sleeves 2| are then rockably mounted on the extended end portions of the shaft II. The draft members H of the implement I2 are loosely disposed between the arms or levers 25 and rest on the rollers 21 carried by the arms 25.

In the event it is desired to raise the implement l2, the valve member 12 is moved to a closed position and the pump 52 is operated by the handle 53. Movement of the piston within the pump 52 in one direction will draw the liquid from the reservoir l8, past the rearwardly opening check valve 55 through the branch 56, the coupling 51, the elbow 68, the pipe 59 and the coupling 58. Movement of the handle or lever 53 in a forward direction will force the liquid out of the cylinder of the pump 52 and at this time the check valve 55 will be closed and the pressure of the fluid will open the forwardly opening check valve 10 so that the liquid will flow through the pipe 69, the coupling 13 and the pipe 5| into the forward end portion The pressure of the liquid in the cylinder 39 will move the piston 42 rearwardly and, at the same time, the sleeves 2| will be rocked by rearward pull on the cranks 28 eifected by the connecting links 29 as the cross head 33 slides rearwardly on the guides 34.

In the event it is desired to lower the implement l2, the valve 12 may be moved to an open position for establishing communication from the pipe 5| through the branch II, the valve 12, the coupling 93 and the flexible hose 52 to the reservoir 60. The weight of the implement 2 will gravitatingly swing the levers or arms 25 downwardly and rock the cranks 28 forwardly at their upper ends so as to shift thepiston 42 forwardly and forcibly eject the liquid from the piston 39.

While I have shown-the hoist mounted on the tractor for raising or lowering an implement such as va sweep rake or the like, which is disposed at the forward end of the tractor, it will be understood that the hoist may be mounted for raising or lowering an implement of a different character which extends from the rear of the tractor.

What I claim is:

1. An implement for attachment to a tractor frame comprising a horizontally disposed transversely extending supporting shaft, means supporting said shaft from the tractor frame, a

a right angular extension 15. Theextension l6 may be secured by fastening devices 11 to the outer side of one of the tractor frame members The upper end portion of the vertical leg 18 of the bracket 14 may be secured by fastening devices 19 to the reservoir 59. A flexible member 80 may be connected at one end with the crank 28and at the other end'with the rear side of the rake structure l3. Preferably, there are two of these flexible members 80, one on each pair of sleeves pivotally mounted on said shaft adjacent the opposite ends thereof, a pair of parallel arms fixed to each sleeve and engageable on opposite sides of an implement beam, 2.. connecting member connecting the free end portions of said arms together and engageable beneath the implement beam, a lever flxed to each sleeve and extending therefrom substantially opposite from said arms, a hydraulic operating member, means connectingsaid operating member with said levers, and a hydraulic hand pump for actuating said operating member.

2. An implement hoist for attachment to a tractor frame comprising a horizontally disposed transversely extending supporting shaft, means supporting said shaft from the tractor frame, a pair of sleeves pivotally mounted on said shaft g 2,286,947 I 3 adjacent the opposite ends thereof, a pair of eluding a pair of parallel draft bars pivoted at parallel arms fixed to each sleeve and engageone end to said frame, a pairof lift' members able on opposite sides of an implement beam, a slidably engaging beneath said bars, intermeconn ctin member connecting the free end perdiate the opposite ends thereof,- means pivotally tions of said arms together and engageable be- 5 supporting said members from said frame, a pair neath the implement beam, a lever fixed to each of parallel guide fmembers, means supporting sleeve and extending therefrom substantially said guide members from said frame, a cross opposite fro'msaid arms, a hydraulic operator, a head slidably engaging said guide members, guide means fixed to and disposed below said means connecting saidguide members with said frame, across head slidable on said guide means 10. lift members for rocking of said lift members fixed to and operable by said operator,.r'neans rupon movement of said cross head along said connecting said cross head to said levers for I guide members, a hydraulic pressure member rocking of said levers and arms upon movement connected with said cross head, and a hydraulic of said cross head, and a hydraulic hand operhand pump connected with said pressure memated pump for actuating said hydraulic operator. 15 her. q

3. In combination, a tractor frame, an' implea ment pivotally carried by said frame and 111- JOHN VIRGIL BANKSON. 

